I need to get an EGT sensor changed in my car (year 2000 S4) , my local garage who I use for basic mechanical jobs, can't do it - they say my car is "too advanced" for them (which I though was amusing given it was a fit and replace for a sensor.. on a 7 year old car

).
Anyway, has anyone used "A for Audi"
http://www.a4audi.co.uk/ based in Clydebank?
I'm thinking of getting them to do it.